INVESTIGADORES
TEN HAVE Arjen
congresos y reuniones científicas
Título:
Effect of Storage on Phenolic Compounds in Tubers from Different Processing Potato Varieties
Autor/es:
VALIÑAS, M; LANTERI ML; DE LASA C; ARJEN TEN HAVE; CALDIZ DO; ANDREU AB
Reunión:
Congreso; 8th International World Potato Congress; 2012
Resumen:
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Abstract
Potato
tubers provide
antioxidant compounds tothediet
like
vitamin C, carotenoids and polyphenols. Polyphenol
compounds have beneficial effects on human health, with roles in the
prevention of cardiovascular and neurodegenerative diseases, cancers,
osteoporosis and diabetes. These compounds also have antimicrobial
activity. Total phenolic content in potato is influenced by intrinsic
(variety and flesh colour) and extrinsic (cultivation and storage
conditions) factors. Since potatoes are usually stored before being
processed into potato chips or frozen potato products, it is
important to know the effect of storage on potato polyphenols. We
studied
the
phenolic content and antioxidant capacity inskin
and fleshof
freshly harvested and 3-month-stored processingpotato
varieties.
Results showed that the
amount of phenolic compounds detected in the skin was up to five
times higher than in the flesh. The phenolic content increased
or remained
constant with storage and this behavior was variety and/or tissue
dependent. As expected, theantioxidant
capacitywas
higher in the skin than in the flesh. The effect of storage on the
antioxidant capacity was tissue dependent with a decrease in the
fleshand
anincrease
in the skin.
Currently, we are studying the expression levels of genes involved in
phenolic biosynthesis. Although results shown that storage can
increase the phenolic content, it is not know the effect on their
bioactivity. Therefore, future studies will be directed to know the
effect of phenolic extracts both on the inhibition of microbial
growth and on the development of Alzheimer´s diseases.